qt在linux下编译资源文件,在Qt Linux环境下编译使用libevent

检查libevent是否安装，是则会列出清单，否则空白。

ls -al /usr/lib |grep libevent

如果没有安装，请去官 下载源文件http://libevent.org/

解压libevent-2.1.8-stable.tar.gz，tar xzvf libevent-2.1.8-stable.tar.gz

然后进入目录编译 ./configure -prefix=/usr

make

make install

安装完成，会自动把相关头文件拷贝到/usr/inclue，库文件拷贝到/usr/lib。

Qt的编译环境，需要在.pro文件添加LIBS += /usr/lib/libevent.so

1、.pro文件

TEMPLATE = app

CONFIG += console

CONFIG -= app_bundle

CONFIG -= qt

SOURCES += main.c

LIBS += /usr/lib/libevent.so

2、main.c文件

#include

#include

#include

#include

#include

#include

#include

#define PORT        8011

#define BACKLOG     5

#define MEM_SIZE    1024

struct event_base* base;

struct sock_ev

{

struct event* read_ev;

struct event* write_ev;

char* buffer;

};

void release_sock_event(struct sock_ev* ev)

{

event_del(ev->read_ev);

free(ev->read_ev);

free(ev->write_ev);

free(ev->buffer);

free(ev);

}

void on_write(int sock, short event, void* arg)

{

char* buffer = (char*)arg;

send(sock, buffer, strlen(buffer), 0);

free(buffer);

}

void on_read(int sock, short event, void* arg)

{

struct event* write_ev;

int size;

struct sock_ev* ev = (struct sock_ev*)arg;

ev->buffer = (char*)malloc(MEM_SIZE);

bzero(ev->buffer, MEM_SIZE);

size = recv(sock, ev->buffer, MEM_SIZE, 0);

printf(“receive data:%s, size:%dn”, ev->buffer, size);

if (size == 0)

{

release_sock_event(ev);

close(sock);

return;

}

event_set(ev->write_ev, sock, EV_WRITE, on_write, ev->buffer);

event_base_set(base, ev->write_ev);

event_add(ev->write_ev, NULL);

}

void on_accept(int sock, short event, void* arg)

{

struct sockaddr_in cli_addr;

int newfd, sin_size;

struct sock_ev* ev = (struct sock_ev*)malloc(sizeof(struct sock_ev));

ev->read_ev = (struct event*)malloc(sizeof(struct event));

ev->write_ev = (struct event*)malloc(sizeof(struct event));

sin_size = sizeof(struct sockaddr_in);

newfd = accept(sock, (struct sockaddr*)&cli_addr, &sin_size);

event_set(ev->read_ev, newfd, EV_READ|EV_PERSIST, on_read, ev);

event_base_set(base, ev->read_ev);

event_add(ev->read_ev, NULL);

}

int main(int argc, char* argv[])

{

struct sockaddr_in my_addr;

int sock;

sock = socket(AF_INET, SOCK_STREAM, 0);

int yes = 1;

setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(int));

memset(&my_addr, 0, sizeof(my_addr));

my_addr.sin_family = AF_INET;

my_addr.sin_port = htons(PORT);

my_addr.sin_addr.s_addr = INADDR_ANY;

bind(sock, (struct sockaddr*)&my_addr, sizeof(struct sockaddr));

listen(sock, BACKLOG);

struct event listen_ev;

base = event_base_new();

event_set(&listen_ev, sock, EV_READ|EV_PERSIST, on_accept, NULL);

event_base_set(base, &listen_ev);

event_add(&listen_ev, NULL);

event_base_dispatch(base);

return 0;

} ———————————

查看当前服务器的链接数

ulimit -a

lsof -p pid

参考文献： linux 络编程

http://www.voidcn.com/cata/1277

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